last night this didnt work, when I woke up this morning I reset my nano and what do you know.
WORKED
Cant explain why but it did.
It was a windows ipod, not mac, tested when I got it. I have never owned an apple product in my life, i only bought the nano 1g for jailbreaking my ps3 and have no intention to use it as an mp3 as I have a tonium pacemaker which is superior in every single way to apples entire range ( im a dj, djing is my thing )
I like the look of this rockbox though, it could tempt me to use the nano more.
It did by the way say that rockbock no installation when it booted but it did go into rockbox and it did allow me to JB my ps3.
Edit - Back to no partition problem.
Edit2 - works when cool, shoved it in my fridge and tried it then it worked.